| Message ID | 1341996904-22893-2-git-send-email-javier.martin@vista-silicon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Javier! Thanks for the patch. On Wed 11 July 2012 10:55:03 Javier Martin wrote: > Some video decoders such as tvp5150 provide separate > video fields (V4L2_FIELD_SEQ_TB). This driver uses > dmaengine to convert this format to V4L2_FIELD_INTERLACED_TB > (weaving) or V4L2_FIELD_NONE (line doubling) Which field is used for the line doubling? Top or bottom? Or is each field doubled, thus doubling the framerate? I also recommend adding SEQ_BT/INTERLACED_BT support: NTSC transmits the bottom field first, so it is useful to have support for that. Regards, Hans > so that the > image can be displayed or processed. > > Of course there will be combing effect in the image but this > can be accepted for some low quality applications. > > Currently YUV420 and YUYV formats are supported but > can be extended later. > --- > drivers/media/video/Kconfig | 8 + > drivers/media/video/Makefile | 2 + > drivers/media/video/m2m-deinterlace.c | 1077 +++++++++++++++++++++++++++++++++ > 3 files changed, 1087 insertions(+) > create mode 100644 drivers/media/video/m2m-deinterlace.c > > diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig > index 9cebf7b..c0b9233 100644 > --- a/drivers/media/video/Kconfig > +++ b/drivers/media/video/Kconfig > @@ -1188,6 +1188,14 @@ config VIDEO_CODA > Coda is a range of video codec IPs that supports > H.264, MPEG-4, and other video formats. > > +config VIDEO_MEM2MEM_DEINTERLACE > + tristate "Deinterlace support" > + depends on VIDEO_DEV && VIDEO_V4L2 && DMA_ENGINE > + select VIDEOBUF2_DMA_CONTIG > + select V4L2_MEM2MEM_DEV > + help > + Generic deinterlacing V4L2 driver. > + > config VIDEO_SAMSUNG_S5P_G2D > tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver" > depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P > diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile > index a04c307..b6a01b1 100644 > --- a/drivers/media/video/Makefile > +++ b/drivers/media/video/Makefile > @@ -189,6 +189,8 @@ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o > obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o > obj-$(CONFIG_VIDEO_CODA) += coda.o > > +obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o > + > obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/ > obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/ > obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/ > diff --git a/drivers/media/video/m2m-deinterlace.c b/drivers/media/video/m2m-deinterlace.c > new file mode 100644 > index 0000000..9642efd > --- /dev/null > +++ b/drivers/media/video/m2m-deinterlace.c > @@ -0,0 +1,1077 @@ > +/* > + * V4L2 deinterlacing support. > + * > + * Copyright (c) 2012 Vista Silicon S.L. > + * Javier Martin <javier.martin@vista-silicon.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by the > + * Free Software Foundation; either version 2 of the > + * License, or (at your option) any later version > + */ > + > +#include <linux/module.h> > +#include <linux/slab.h> > +#include <linux/interrupt.h> > +#include <linux/dmaengine.h> > +#include <linux/platform_device.h> > + > +#include <media/v4l2-mem2mem.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-ioctl.h> > +#include <media/videobuf2-dma-contig.h> > + > +#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace" > + > +MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine"); > +MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); > +MODULE_LICENSE("GPL"); > +MODULE_VERSION("0.0.1"); > + > +static bool debug = true; > +module_param(debug, bool, 0644); > + > +/* Flags that indicate a format can be used for capture/output */ > +#define MEM2MEM_CAPTURE (1 << 0) > +#define MEM2MEM_OUTPUT (1 << 1) > + > +#define MEM2MEM_NAME "m2m-deinterlace" > + > +#define dprintk(dev, fmt, arg...) \ > + v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) > + > +struct deinterlace_fmt { > + char *name; > + u32 fourcc; > + enum v4l2_field field; > + /* Types the format can be used for */ > + u32 types; > +}; > + > +static struct deinterlace_fmt formats[] = { > + { > + .name = "YUV 4:2:0 Planar (weaving)", > + .fourcc = V4L2_PIX_FMT_YUV420, > + .field = V4L2_FIELD_INTERLACED_TB, > + .types = MEM2MEM_CAPTURE, > + }, > + { > + .name = "YUV 4:2:0 Planar (line doubling)", > + .fourcc = V4L2_PIX_FMT_YUV420, > + /* Line doubling, top field */ > + .field = V4L2_FIELD_NONE, > + .types = MEM2MEM_CAPTURE, > + }, > + { > + .name = "YUYV 4:2:2 (weaving)", > + .fourcc = V4L2_PIX_FMT_YUYV, > + .field = V4L2_FIELD_INTERLACED_TB, > + .types = MEM2MEM_CAPTURE, > + }, > + { > + .name = "YUYV 4:2:2 (line doubling)", > + .fourcc = V4L2_PIX_FMT_YUYV, > + /* Line doubling, top field */ > + .field = V4L2_FIELD_NONE, > + .types = MEM2MEM_CAPTURE, > + }, > + { > + .name = "YUV 4:2:0 Planar (top-bottom)", > + .fourcc = V4L2_PIX_FMT_YUV420, > + .field = V4L2_FIELD_SEQ_TB, > + .types = MEM2MEM_OUTPUT, > + }, > + { > + .name = "YUYV 4:2:2 (top-bottom)", > + .fourcc = V4L2_PIX_FMT_YUYV, > + .field = V4L2_FIELD_SEQ_TB, > + .types = MEM2MEM_OUTPUT, > + }, > +}; > + > +/* Per-queue, driver-specific private data */ > +struct deinterlace_q_data { > + unsigned int width; > + unsigned int height; > + unsigned int sizeimage; > + struct deinterlace_fmt *fmt; > +}; > + > +enum { > + V4L2_M2M_SRC = 0, > + V4L2_M2M_DST = 1, > +}; > + > +enum { > + YUV420_DMA_Y_ODD, > + YUV420_DMA_Y_EVEN, > + YUV420_DMA_U_ODD, > + YUV420_DMA_U_EVEN, > + YUV420_DMA_V_ODD, > + YUV420_DMA_V_EVEN, > + YUV420_DMA_Y_ODD_DOUBLING, > + YUV420_DMA_U_ODD_DOUBLING, > + YUV420_DMA_V_ODD_DOUBLING, > + YUYV_DMA_ODD, > + YUYV_DMA_EVEN, > + YUYV_DMA_EVEN_DOUBLING, > +}; > + > +/* Source and destination queue data */ > +static struct deinterlace_q_data q_data[2]; > + > +static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type) > +{ > + switch (type) { > + case V4L2_BUF_TYPE_VIDEO_OUTPUT: > + return &q_data[V4L2_M2M_SRC]; > + case V4L2_BUF_TYPE_VIDEO_CAPTURE: > + return &q_data[V4L2_M2M_DST]; > + default: > + BUG(); > + } > + return NULL; > +} > + > +#define NUM_FORMATS ARRAY_SIZE(formats) > + > +static struct deinterlace_fmt *find_format(struct v4l2_format *f) > +{ > + struct deinterlace_fmt *fmt; > + unsigned int k; > + > + for (k = 0; k < NUM_FORMATS; k++) { > + fmt = &formats[k]; > + if ((fmt->types == f->type) && > + (fmt->fourcc == f->fmt.pix.pixelformat) && > + (fmt->field == f->fmt.pix.field)) > + break; > + } > + > + if (k == NUM_FORMATS) > + return NULL; > + > + return &formats[k]; > +} > + > +struct deinterlace_dev { > + struct v4l2_device v4l2_dev; > + struct video_device *vfd; > + > + atomic_t busy; > + struct mutex dev_mutex; > + spinlock_t irqlock; > + > + struct dma_chan *dma_chan; > + > + struct v4l2_m2m_dev *m2m_dev; > + struct vb2_alloc_ctx *alloc_ctx; > +}; > + > +struct deinterlace_ctx { > + struct deinterlace_dev *dev; > + > + /* Abort requested by m2m */ > + int aborting; > + dma_cookie_t cookie; > + struct v4l2_m2m_ctx *m2m_ctx; > + struct dma_interleaved_template *xt; > +}; > + > +/* > + * mem2mem callbacks > + */ > +static int deinterlace_job_ready(void *priv) > +{ > + struct deinterlace_ctx *ctx = priv; > + struct deinterlace_dev *pcdev = ctx->dev; > + > + if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) > + && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) > + && (atomic_read(&ctx->dev->busy) == 0)) { > + dprintk(pcdev, "Task ready\n"); > + return 1; > + } > + > + dprintk(pcdev, "Task not ready to run\n"); > + > + return 0; > +} > + > +static void deinterlace_job_abort(void *priv) > +{ > + struct deinterlace_ctx *ctx = priv; > + struct deinterlace_dev *pcdev = ctx->dev; > + > + ctx->aborting = 1; > + > + dprintk(pcdev, "Aborting task\n"); > + > + v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx); > +} > + > +static void deinterlace_lock(void *priv) > +{ > + struct deinterlace_ctx *ctx = priv; > + struct deinterlace_dev *pcdev = ctx->dev; > + mutex_lock(&pcdev->dev_mutex); > +} > + > +static void deinterlace_unlock(void *priv) > +{ > + struct deinterlace_ctx *ctx = priv; > + struct deinterlace_dev *pcdev = ctx->dev; > + mutex_unlock(&pcdev->dev_mutex); > +} > + > +static void dma_callback(void *data) > +{ > + struct deinterlace_ctx *curr_ctx = data; > + struct deinterlace_dev *pcdev = curr_ctx->dev; > + struct vb2_buffer *src_vb, *dst_vb; > + > + atomic_set(&pcdev->busy, 0); > + > + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); > + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); > + > + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); > + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); > + > + v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); > + > + dprintk(pcdev, "dma transfers completed.\n"); > +} > + > +static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, > + int do_callback) > +{ > + struct deinterlace_q_data *s_q_data, *d_q_data; > + struct vb2_buffer *src_buf, *dst_buf; > + struct deinterlace_dev *pcdev = ctx->dev; > + struct dma_chan *chan = pcdev->dma_chan; > + struct dma_device *dmadev = chan->device; > + struct dma_async_tx_descriptor *tx; > + unsigned int s_width, s_height; > + unsigned int d_width, d_height; > + unsigned int d_size, s_size; > + dma_addr_t p_in, p_out; > + enum dma_ctrl_flags flags; > + > + src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); > + dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); > + > + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); > + s_width = s_q_data->width; > + s_height = s_q_data->height; > + s_size = s_width * s_height; > + > + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); > + d_width = d_q_data->width; > + d_height = d_q_data->height; > + d_size = d_width * d_height; > + > + p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0); > + p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0); > + if (!p_in || !p_out) { > + v4l2_err(&pcdev->v4l2_dev, > + "Acquiring kernel pointers to buffers failed\n"); > + return; > + } > + > + switch (op) { > + case YUV420_DMA_Y_ODD: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width; > + ctx->xt->sgl[0].icg = s_width; > + ctx->xt->src_start = p_in; > + ctx->xt->dst_start = p_out; > + break; > + case YUV420_DMA_Y_EVEN: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width; > + ctx->xt->sgl[0].icg = s_width; > + ctx->xt->src_start = p_in + s_size / 2; > + ctx->xt->dst_start = p_out + s_width; > + break; > + case YUV420_DMA_U_ODD: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + s_size; > + ctx->xt->dst_start = p_out + s_size; > + break; > + case YUV420_DMA_U_EVEN: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + (9 * s_size) / 8; > + ctx->xt->dst_start = p_out + s_size + s_width / 2; > + break; > + case YUV420_DMA_V_ODD: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + (5 * s_size) / 4; > + ctx->xt->dst_start = p_out + (5 * s_size) / 4; > + break; > + case YUV420_DMA_V_EVEN: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + (11 * s_size) / 8; > + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; > + break; > + case YUV420_DMA_Y_ODD_DOUBLING: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width; > + ctx->xt->sgl[0].icg = s_width; > + ctx->xt->src_start = p_in; > + ctx->xt->dst_start = p_out + s_width; > + break; > + case YUV420_DMA_U_ODD_DOUBLING: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + s_size; > + ctx->xt->dst_start = p_out + s_size + s_width / 2; > + break; > + case YUV420_DMA_V_ODD_DOUBLING: > + ctx->xt->numf = s_height / 4; > + ctx->xt->sgl[0].size = s_width / 2; > + ctx->xt->sgl[0].icg = s_width / 2; > + ctx->xt->src_start = p_in + (5 * s_size) / 4; > + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; > + break; > + case YUYV_DMA_ODD: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width * 2; > + ctx->xt->sgl[0].icg = s_width * 2; > + ctx->xt->src_start = p_in; > + ctx->xt->dst_start = p_out; > + break; > + case YUYV_DMA_EVEN: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width * 2; > + ctx->xt->sgl[0].icg = s_width * 2; > + ctx->xt->src_start = p_in + s_size; > + ctx->xt->dst_start = p_out + s_width * 2; > + break; > + case YUYV_DMA_EVEN_DOUBLING: > + default: > + ctx->xt->numf = s_height / 2; > + ctx->xt->sgl[0].size = s_width * 2; > + ctx->xt->sgl[0].icg = s_width * 2; > + ctx->xt->src_start = p_in; > + ctx->xt->dst_start = p_out + s_width * 2; > + break; > + } > + > + /* Common parameters for al transfers */ > + ctx->xt->frame_size = 1; > + ctx->xt->dir = DMA_MEM_TO_MEM; > + ctx->xt->src_sgl = false; > + ctx->xt->dst_sgl = true; > + flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | > + DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP; > + > + tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); > + if (tx == NULL) { > + v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); > + return; > + } > + > + if (do_callback) { > + tx->callback = dma_callback; > + tx->callback_param = ctx; > + } > + > + ctx->cookie = dmaengine_submit(tx); > + if (dma_submit_error(ctx->cookie)) { > + v4l2_warn(&pcdev->v4l2_dev, > + "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", > + ctx->cookie, p_in, p_out, s_size * 3/2); > + return; > + } > + > + dma_async_issue_pending(chan); > +} > + > +static void deinterlace_device_run(void *priv) > +{ > + struct deinterlace_ctx *ctx = priv; > + struct deinterlace_q_data *dst_q_data; > + > + atomic_set(&ctx->dev->busy, 1); > + > + dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); > + > + dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); > + > + switch (dst_q_data->fmt->fourcc) { > + case V4L2_PIX_FMT_YUV420: > + switch (dst_q_data->fmt->field) { > + case V4L2_FIELD_INTERLACED_TB: > + dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", > + __func__); > + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); > + break; > + case V4L2_FIELD_NONE: > + default: > + dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", > + __func__); > + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); > + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); > + break; > + } > + break; > + case V4L2_PIX_FMT_YUYV: > + default: > + switch (dst_q_data->fmt->field) { > + case V4L2_FIELD_INTERLACED_TB: > + dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", > + __func__); > + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); > + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); > + break; > + case V4L2_FIELD_NONE: > + default: > + dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", > + __func__); > + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); > + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); > + break; > + } > + break; > + } > + > + dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); > +} > + > +/* > + * video ioctls > + */ > +static int vidioc_querycap(struct file *file, void *priv, > + struct v4l2_capability *cap) > +{ > + strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1); > + strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1); > + cap->bus_info[0] = 0; > + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT > + | V4L2_CAP_STREAMING; > + > + return 0; > +} > + > +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) > +{ > + int i, num; > + struct deinterlace_fmt *fmt; > + > + num = 0; > + > + for (i = 0; i < NUM_FORMATS; ++i) { > + if (formats[i].types & type) { > + /* index-th format of type type found ? */ > + if (num == f->index) > + break; > + /* Correct type but haven't reached our index yet, > + * just increment per-type index */ > + ++num; > + } > + } > + > + if (i < NUM_FORMATS) { > + /* Format found */ > + fmt = &formats[i]; > + strncpy(f->description, fmt->name, sizeof(f->description) - 1); > + f->pixelformat = fmt->fourcc; > + return 0; > + } > + > + /* Format not found */ > + return -EINVAL; > +} > + > +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, > + struct v4l2_fmtdesc *f) > +{ > + return enum_fmt(f, MEM2MEM_CAPTURE); > +} > + > +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_fmtdesc *f) > +{ > + return enum_fmt(f, MEM2MEM_OUTPUT); > +} > + > +static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) > +{ > + struct vb2_queue *vq; > + struct deinterlace_q_data *q_data; > + > + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); > + if (!vq) > + return -EINVAL; > + > + q_data = get_q_data(f->type); > + > + f->fmt.pix.width = q_data->width; > + f->fmt.pix.height = q_data->height; > + f->fmt.pix.field = q_data->fmt->field; > + f->fmt.pix.pixelformat = q_data->fmt->fourcc; > + > + switch (q_data->fmt->fourcc) { > + case V4L2_PIX_FMT_YUV420: > + f->fmt.pix.bytesperline = q_data->width * 3 / 2; > + break; > + case V4L2_PIX_FMT_YUYV: > + default: > + f->fmt.pix.bytesperline = q_data->width * 2; > + } > + > + f->fmt.pix.sizeimage = q_data->sizeimage; > + > + return 0; > +} > + > +static int vidioc_g_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + return vidioc_g_fmt(priv, f); > +} > + > +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + return vidioc_g_fmt(priv, f); > +} > + > +static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) > +{ > + switch (f->fmt.pix.pixelformat) { > + case V4L2_PIX_FMT_YUV420: > + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; > + break; > + case V4L2_PIX_FMT_YUYV: > + default: > + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; > + } > + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; > + > + return 0; > +} > + > +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct deinterlace_fmt *fmt; > + struct deinterlace_ctx *ctx = priv; > + > + fmt = find_format(f); > + if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Fourcc format (0x%08x) invalid.\n", > + f->fmt.pix.pixelformat); > + return -EINVAL; > + } > + return vidioc_try_fmt(f, fmt); > +} > + > +static int vidioc_try_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct deinterlace_fmt *fmt; > + struct deinterlace_ctx *ctx = priv; > + > + fmt = find_format(f); > + if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Fourcc format (0x%08x) invalid.\n", > + f->fmt.pix.pixelformat); > + return -EINVAL; > + } > + > + return vidioc_try_fmt(f, fmt); > +} > + > +static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) > +{ > + struct deinterlace_q_data *q_data; > + struct vb2_queue *vq; > + > + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); > + if (!vq) > + return -EINVAL; > + > + q_data = get_q_data(f->type); > + if (!q_data) > + return -EINVAL; > + > + if (vb2_is_busy(vq)) { > + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); > + return -EBUSY; > + } > + > + q_data->fmt = find_format(f); > + if (!q_data->fmt) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", > + f->type, f->fmt.pix.width, f->fmt.pix.height, > + f->fmt.pix.pixelformat, f->fmt.pix.field); > + return -EINVAL; > + } > + > + q_data->width = f->fmt.pix.width; > + q_data->height = f->fmt.pix.height; > + > + switch (f->fmt.pix.pixelformat) { > + case V4L2_PIX_FMT_YUV420: > + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; > + break; > + case V4L2_PIX_FMT_YUYV: > + default: > + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; > + } > + > + dprintk(ctx->dev, > + "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", > + f->type, q_data->width, q_data->height, q_data->fmt->fourcc, > + q_data->fmt->field); > + > + return 0; > +} > + > +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + int ret; > + > + ret = vidioc_try_fmt_vid_cap(file, priv, f); > + if (ret) > + return ret; > + return vidioc_s_fmt(priv, f); > +} > + > +static int vidioc_s_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + int ret; > + > + ret = vidioc_try_fmt_vid_out(file, priv, f); > + if (ret) > + return ret; > + > + return vidioc_s_fmt(priv, f); > +} > + > +static int vidioc_reqbufs(struct file *file, void *priv, > + struct v4l2_requestbuffers *reqbufs) > +{ > + struct deinterlace_ctx *ctx = priv; > + > + return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); > +} > + > +static int vidioc_querybuf(struct file *file, void *priv, > + struct v4l2_buffer *buf) > +{ > + struct deinterlace_ctx *ctx = priv; > + > + return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); > +} > + > +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) > +{ > + struct deinterlace_ctx *ctx = priv; > + > + return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); > +} > + > +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) > +{ > + struct deinterlace_ctx *ctx = priv; > + > + return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); > +} > + > +static int vidioc_streamon(struct file *file, void *priv, > + enum v4l2_buf_type type) > +{ > + struct deinterlace_q_data *s_q_data, *d_q_data; > + struct deinterlace_ctx *ctx = priv; > + > + /* Check that src and dst queues have the same format */ > + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); > + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); > + if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) > + return -EINVAL; > + > + return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); > +} > + > +static int vidioc_streamoff(struct file *file, void *priv, > + enum v4l2_buf_type type) > +{ > + struct deinterlace_ctx *ctx = priv; > + > + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); > +} > + > +static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { > + .vidioc_querycap = vidioc_querycap, > + > + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, > + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, > + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, > + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, > + > + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, > + .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, > + .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, > + .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, > + > + .vidioc_reqbufs = vidioc_reqbufs, > + .vidioc_querybuf = vidioc_querybuf, > + > + .vidioc_qbuf = vidioc_qbuf, > + .vidioc_dqbuf = vidioc_dqbuf, > + > + .vidioc_streamon = vidioc_streamon, > + .vidioc_streamoff = vidioc_streamoff, > +}; > + > + > +/* > + * Queue operations > + */ > +struct vb2_dc_conf { > + struct device *dev; > +}; > + > +static int deinterlace_queue_setup(struct vb2_queue *vq, > + const struct v4l2_format *fmt, > + unsigned int *nbuffers, unsigned int *nplanes, > + unsigned int sizes[], void *alloc_ctxs[]) > +{ > + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); > + struct deinterlace_q_data *q_data; > + unsigned int size, count = *nbuffers; > + > + q_data = get_q_data(vq->type); > + > + switch (q_data->fmt->fourcc) { > + case V4L2_PIX_FMT_YUV420: > + size = q_data->width * q_data->height * 3 / 2; > + break; > + case V4L2_PIX_FMT_YUYV: > + default: > + size = q_data->width * q_data->height * 2; > + } > + > + *nplanes = 1; > + *nbuffers = count; > + sizes[0] = size; > + > + alloc_ctxs[0] = ctx->dev->alloc_ctx; > + > + dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); > + > + return 0; > +} > + > +static int deinterlace_buf_prepare(struct vb2_buffer *vb) > +{ > + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); > + struct deinterlace_q_data *q_data; > + > + dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); > + > + q_data = get_q_data(vb->vb2_queue->type); > + > + if (vb2_plane_size(vb, 0) < q_data->sizeimage) { > + dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", > + __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); > + return -EINVAL; > + } > + > + vb2_set_plane_payload(vb, 0, q_data->sizeimage); > + > + return 0; > +} > + > +static void deinterlace_buf_queue(struct vb2_buffer *vb) > +{ > + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); > + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); > +} > + > +static struct vb2_ops deinterlace_qops = { > + .queue_setup = deinterlace_queue_setup, > + .buf_prepare = deinterlace_buf_prepare, > + .buf_queue = deinterlace_buf_queue, > +}; > + > +static int queue_init(void *priv, struct vb2_queue *src_vq, > + struct vb2_queue *dst_vq) > +{ > + struct deinterlace_ctx *ctx = priv; > + int ret; > + > + memset(src_vq, 0, sizeof(*src_vq)); > + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; > + src_vq->io_modes = VB2_MMAP | VB2_USERPTR; > + src_vq->drv_priv = ctx; > + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); > + src_vq->ops = &deinterlace_qops; > + src_vq->mem_ops = &vb2_dma_contig_memops; > + > + ret = vb2_queue_init(src_vq); > + if (ret) > + return ret; > + > + memset(dst_vq, 0, sizeof(*dst_vq)); > + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; > + dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; > + dst_vq->drv_priv = ctx; > + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); > + dst_vq->ops = &deinterlace_qops; > + dst_vq->mem_ops = &vb2_dma_contig_memops; > + > + return vb2_queue_init(dst_vq); > +} > + > +/* > + * File operations > + */ > +static int deinterlace_open(struct file *file) > +{ > + struct deinterlace_dev *pcdev = video_drvdata(file); > + struct deinterlace_ctx *ctx = NULL; > + > + ctx = kzalloc(sizeof *ctx, GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + file->private_data = ctx; > + ctx->dev = pcdev; > + > + ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); > + if (IS_ERR(ctx->m2m_ctx)) { > + int ret = PTR_ERR(ctx->m2m_ctx); > + > + kfree(ctx); > + return ret; > + } > + > + ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) + > + sizeof(struct data_chunk), GFP_KERNEL); > + if (!ctx->xt) { > + int ret = PTR_ERR(ctx->xt); > + > + kfree(ctx); > + return ret; > + } > + > + dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); > + > + return 0; > +} > + > +static int deinterlace_release(struct file *file) > +{ > + struct deinterlace_dev *pcdev = video_drvdata(file); > + struct deinterlace_ctx *ctx = file->private_data; > + > + dprintk(pcdev, "Releasing instance %p\n", ctx); > + > + v4l2_m2m_ctx_release(ctx->m2m_ctx); > + kfree(ctx->xt); > + kfree(ctx); > + > + return 0; > +} > + > +static unsigned int deinterlace_poll(struct file *file, > + struct poll_table_struct *wait) > +{ > + struct deinterlace_ctx *ctx = file->private_data; > + int ret; > + > + deinterlace_lock(ctx); > + ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); > + deinterlace_unlock(ctx); > + > + return ret; > +} > + > +static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) > +{ > + struct deinterlace_ctx *ctx = file->private_data; > + > + return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); > +} > + > +static const struct v4l2_file_operations deinterlace_fops = { > + .owner = THIS_MODULE, > + .open = deinterlace_open, > + .release = deinterlace_release, > + .poll = deinterlace_poll, > + .unlocked_ioctl = video_ioctl2, > + .mmap = deinterlace_mmap, > +}; > + > +static struct video_device deinterlace_videodev = { > + .name = MEM2MEM_NAME, > + .fops = &deinterlace_fops, > + .ioctl_ops = &deinterlace_ioctl_ops, > + .minor = -1, > + .release = video_device_release, > +}; > + > +static struct v4l2_m2m_ops m2m_ops = { > + .device_run = deinterlace_device_run, > + .job_ready = deinterlace_job_ready, > + .job_abort = deinterlace_job_abort, > + .lock = deinterlace_lock, > + .unlock = deinterlace_unlock, > +}; > + > +static int deinterlace_probe(struct platform_device *pdev) > +{ > + struct deinterlace_dev *pcdev; > + struct video_device *vfd; > + dma_cap_mask_t mask; > + int ret = 0; > + > + pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); > + if (!pcdev) > + return -ENOMEM; > + > + spin_lock_init(&pcdev->irqlock); > + > + dma_cap_zero(mask); > + dma_cap_set(DMA_INTERLEAVE, mask); > + pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); > + if (!pcdev->dma_chan) > + goto free_dev; > + > + if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { > + v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); > + goto rel_dma; > + } > + > + ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); > + if (ret) > + goto rel_dma; > + > + atomic_set(&pcdev->busy, 0); > + mutex_init(&pcdev->dev_mutex); > + > + vfd = video_device_alloc(); > + if (!vfd) { > + v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); > + ret = -ENOMEM; > + goto unreg_dev; > + } > + > + *vfd = deinterlace_videodev; > + vfd->lock = &pcdev->dev_mutex; > + > + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); > + if (ret) { > + v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); > + goto rel_vdev; > + } > + > + video_set_drvdata(vfd, pcdev); > + snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); > + pcdev->vfd = vfd; > + v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME > + " Device registered as /dev/video%d\n", vfd->num); > + > + platform_set_drvdata(pdev, pcdev); > + > + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); > + if (IS_ERR(pcdev->alloc_ctx)) { > + v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); > + ret = PTR_ERR(pcdev->alloc_ctx); > + goto err_ctx; > + } > + > + pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); > + if (IS_ERR(pcdev->m2m_dev)) { > + v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); > + ret = PTR_ERR(pcdev->m2m_dev); > + goto err_m2m; > + } > + > + q_data[V4L2_M2M_SRC].fmt = &formats[1]; > + q_data[V4L2_M2M_DST].fmt = &formats[0]; > + > + return 0; > + > + v4l2_m2m_release(pcdev->m2m_dev); > +err_m2m: > + video_unregister_device(pcdev->vfd); > +err_ctx: > + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); > +rel_vdev: > + video_device_release(vfd); > +unreg_dev: > + v4l2_device_unregister(&pcdev->v4l2_dev); > +rel_dma: > + dma_release_channel(pcdev->dma_chan); > +free_dev: > + kfree(pcdev); > + > + return ret; > +} > + > +static int deinterlace_remove(struct platform_device *pdev) > +{ > + struct deinterlace_dev *pcdev = > + (struct deinterlace_dev *)platform_get_drvdata(pdev); > + > + v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); > + v4l2_m2m_release(pcdev->m2m_dev); > + video_unregister_device(pcdev->vfd); > + v4l2_device_unregister(&pcdev->v4l2_dev); > + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); > + dma_release_channel(pcdev->dma_chan); > + kfree(pcdev); > + > + return 0; > +} > + > +static struct platform_driver deinterlace_pdrv = { > + .probe = deinterlace_probe, > + .remove = deinterlace_remove, > + .driver = { > + .name = MEM2MEM_NAME, > + .owner = THIS_MODULE, > + }, > +}; > + > +static void __exit deinterlace_exit(void) > +{ > + platform_driver_unregister(&deinterlace_pdrv); > +} > + > +static int __init deinterlace_init(void) > +{ > + return platform_driver_register(&deinterlace_pdrv); > +} > + > +module_init(deinterlace_init); > +module_exit(deinterlace_exit); > + > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Hans, thank you for your comments. On 11 July 2012 11:45, Hans Verkuil <hverkuil@xs4all.nl> wrote: > Hi Javier! > > Thanks for the patch. > > On Wed 11 July 2012 10:55:03 Javier Martin wrote: >> Some video decoders such as tvp5150 provide separate >> video fields (V4L2_FIELD_SEQ_TB). This driver uses >> dmaengine to convert this format to V4L2_FIELD_INTERLACED_TB >> (weaving) or V4L2_FIELD_NONE (line doubling) > > Which field is used for the line doubling? Top or bottom? Or is each field > doubled, thus doubling the framerate? No, just top field is used. I don't know if it's worth defining a new field format for doubling fields. > I also recommend adding SEQ_BT/INTERLACED_BT support: NTSC transmits the bottom > field first, so it is useful to have support for that. Adding that is quite easy but I cannot test it. Maybe someone could add it later?
On Wed 11 July 2012 12:02:48 javier Martin wrote: > Hi Hans, > thank you for your comments. > > On 11 July 2012 11:45, Hans Verkuil <hverkuil@xs4all.nl> wrote: > > Hi Javier! > > > > Thanks for the patch. > > > > On Wed 11 July 2012 10:55:03 Javier Martin wrote: > >> Some video decoders such as tvp5150 provide separate > >> video fields (V4L2_FIELD_SEQ_TB). This driver uses > >> dmaengine to convert this format to V4L2_FIELD_INTERLACED_TB > >> (weaving) or V4L2_FIELD_NONE (line doubling) > > > > Which field is used for the line doubling? Top or bottom? Or is each field > > doubled, thus doubling the framerate? > > No, just top field is used. > I don't know if it's worth defining a new field format for doubling fields. Probably not, but just make sure it is clearly documented. > > I also recommend adding SEQ_BT/INTERLACED_BT support: NTSC transmits the bottom > > field first, so it is useful to have support for that. > > Adding that is quite easy but I cannot test it. > Maybe someone could add it later? It shouldn't be too hard to test: make the top field red and the bottom field blue and check if the resulting image is correct. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 9cebf7b..c0b9233 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -1188,6 +1188,14 @@ config VIDEO_CODA Coda is a range of video codec IPs that supports H.264, MPEG-4, and other video formats. +config VIDEO_MEM2MEM_DEINTERLACE + tristate "Deinterlace support" + depends on VIDEO_DEV && VIDEO_V4L2 && DMA_ENGINE + select VIDEOBUF2_DMA_CONTIG + select V4L2_MEM2MEM_DEV + help + Generic deinterlacing V4L2 driver. + config VIDEO_SAMSUNG_S5P_G2D tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver" depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index a04c307..b6a01b1 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -189,6 +189,8 @@ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o obj-$(CONFIG_VIDEO_CODA) += coda.o +obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o + obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/ diff --git a/drivers/media/video/m2m-deinterlace.c b/drivers/media/video/m2m-deinterlace.c new file mode 100644 index 0000000..9642efd --- /dev/null +++ b/drivers/media/video/m2m-deinterlace.c @@ -0,0 +1,1077 @@ +/* + * V4L2 deinterlacing support. + * + * Copyright (c) 2012 Vista Silicon S.L. + * Javier Martin <javier.martin@vista-silicon.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the + * License, or (at your option) any later version + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/dmaengine.h> +#include <linux/platform_device.h> + +#include <media/v4l2-mem2mem.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf2-dma-contig.h> + +#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace" + +MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine"); +MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.0.1"); + +static bool debug = true; +module_param(debug, bool, 0644); + +/* Flags that indicate a format can be used for capture/output */ +#define MEM2MEM_CAPTURE (1 << 0) +#define MEM2MEM_OUTPUT (1 << 1) + +#define MEM2MEM_NAME "m2m-deinterlace" + +#define dprintk(dev, fmt, arg...) \ + v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) + +struct deinterlace_fmt { + char *name; + u32 fourcc; + enum v4l2_field field; + /* Types the format can be used for */ + u32 types; +}; + +static struct deinterlace_fmt formats[] = { + { + .name = "YUV 4:2:0 Planar (weaving)", + .fourcc = V4L2_PIX_FMT_YUV420, + .field = V4L2_FIELD_INTERLACED_TB, + .types = MEM2MEM_CAPTURE, + }, + { + .name = "YUV 4:2:0 Planar (line doubling)", + .fourcc = V4L2_PIX_FMT_YUV420, + /* Line doubling, top field */ + .field = V4L2_FIELD_NONE, + .types = MEM2MEM_CAPTURE, + }, + { + .name = "YUYV 4:2:2 (weaving)", + .fourcc = V4L2_PIX_FMT_YUYV, + .field = V4L2_FIELD_INTERLACED_TB, + .types = MEM2MEM_CAPTURE, + }, + { + .name = "YUYV 4:2:2 (line doubling)", + .fourcc = V4L2_PIX_FMT_YUYV, + /* Line doubling, top field */ + .field = V4L2_FIELD_NONE, + .types = MEM2MEM_CAPTURE, + }, + { + .name = "YUV 4:2:0 Planar (top-bottom)", + .fourcc = V4L2_PIX_FMT_YUV420, + .field = V4L2_FIELD_SEQ_TB, + .types = MEM2MEM_OUTPUT, + }, + { + .name = "YUYV 4:2:2 (top-bottom)", + .fourcc = V4L2_PIX_FMT_YUYV, + .field = V4L2_FIELD_SEQ_TB, + .types = MEM2MEM_OUTPUT, + }, +}; + +/* Per-queue, driver-specific private data */ +struct deinterlace_q_data { + unsigned int width; + unsigned int height; + unsigned int sizeimage; + struct deinterlace_fmt *fmt; +}; + +enum { + V4L2_M2M_SRC = 0, + V4L2_M2M_DST = 1, +}; + +enum { + YUV420_DMA_Y_ODD, + YUV420_DMA_Y_EVEN, + YUV420_DMA_U_ODD, + YUV420_DMA_U_EVEN, + YUV420_DMA_V_ODD, + YUV420_DMA_V_EVEN, + YUV420_DMA_Y_ODD_DOUBLING, + YUV420_DMA_U_ODD_DOUBLING, + YUV420_DMA_V_ODD_DOUBLING, + YUYV_DMA_ODD, + YUYV_DMA_EVEN, + YUYV_DMA_EVEN_DOUBLING, +}; + +/* Source and destination queue data */ +static struct deinterlace_q_data q_data[2]; + +static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + return &q_data[V4L2_M2M_SRC]; + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return &q_data[V4L2_M2M_DST]; + default: + BUG(); + } + return NULL; +} + +#define NUM_FORMATS ARRAY_SIZE(formats) + +static struct deinterlace_fmt *find_format(struct v4l2_format *f) +{ + struct deinterlace_fmt *fmt; + unsigned int k; + + for (k = 0; k < NUM_FORMATS; k++) { + fmt = &formats[k]; + if ((fmt->types == f->type) && + (fmt->fourcc == f->fmt.pix.pixelformat) && + (fmt->field == f->fmt.pix.field)) + break; + } + + if (k == NUM_FORMATS) + return NULL; + + return &formats[k]; +} + +struct deinterlace_dev { + struct v4l2_device v4l2_dev; + struct video_device *vfd; + + atomic_t busy; + struct mutex dev_mutex; + spinlock_t irqlock; + + struct dma_chan *dma_chan; + + struct v4l2_m2m_dev *m2m_dev; + struct vb2_alloc_ctx *alloc_ctx; +}; + +struct deinterlace_ctx { + struct deinterlace_dev *dev; + + /* Abort requested by m2m */ + int aborting; + dma_cookie_t cookie; + struct v4l2_m2m_ctx *m2m_ctx; + struct dma_interleaved_template *xt; +}; + +/* + * mem2mem callbacks + */ +static int deinterlace_job_ready(void *priv) +{ + struct deinterlace_ctx *ctx = priv; + struct deinterlace_dev *pcdev = ctx->dev; + + if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) + && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) + && (atomic_read(&ctx->dev->busy) == 0)) { + dprintk(pcdev, "Task ready\n"); + return 1; + } + + dprintk(pcdev, "Task not ready to run\n"); + + return 0; +} + +static void deinterlace_job_abort(void *priv) +{ + struct deinterlace_ctx *ctx = priv; + struct deinterlace_dev *pcdev = ctx->dev; + + ctx->aborting = 1; + + dprintk(pcdev, "Aborting task\n"); + + v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx); +} + +static void deinterlace_lock(void *priv) +{ + struct deinterlace_ctx *ctx = priv; + struct deinterlace_dev *pcdev = ctx->dev; + mutex_lock(&pcdev->dev_mutex); +} + +static void deinterlace_unlock(void *priv) +{ + struct deinterlace_ctx *ctx = priv; + struct deinterlace_dev *pcdev = ctx->dev; + mutex_unlock(&pcdev->dev_mutex); +} + +static void dma_callback(void *data) +{ + struct deinterlace_ctx *curr_ctx = data; + struct deinterlace_dev *pcdev = curr_ctx->dev; + struct vb2_buffer *src_vb, *dst_vb; + + atomic_set(&pcdev->busy, 0); + + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); + + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); + + v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); + + dprintk(pcdev, "dma transfers completed.\n"); +} + +static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, + int do_callback) +{ + struct deinterlace_q_data *s_q_data, *d_q_data; + struct vb2_buffer *src_buf, *dst_buf; + struct deinterlace_dev *pcdev = ctx->dev; + struct dma_chan *chan = pcdev->dma_chan; + struct dma_device *dmadev = chan->device; + struct dma_async_tx_descriptor *tx; + unsigned int s_width, s_height; + unsigned int d_width, d_height; + unsigned int d_size, s_size; + dma_addr_t p_in, p_out; + enum dma_ctrl_flags flags; + + src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); + dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); + + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); + s_width = s_q_data->width; + s_height = s_q_data->height; + s_size = s_width * s_height; + + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); + d_width = d_q_data->width; + d_height = d_q_data->height; + d_size = d_width * d_height; + + p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0); + p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0); + if (!p_in || !p_out) { + v4l2_err(&pcdev->v4l2_dev, + "Acquiring kernel pointers to buffers failed\n"); + return; + } + + switch (op) { + case YUV420_DMA_Y_ODD: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width; + ctx->xt->sgl[0].icg = s_width; + ctx->xt->src_start = p_in; + ctx->xt->dst_start = p_out; + break; + case YUV420_DMA_Y_EVEN: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width; + ctx->xt->sgl[0].icg = s_width; + ctx->xt->src_start = p_in + s_size / 2; + ctx->xt->dst_start = p_out + s_width; + break; + case YUV420_DMA_U_ODD: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + s_size; + ctx->xt->dst_start = p_out + s_size; + break; + case YUV420_DMA_U_EVEN: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + (9 * s_size) / 8; + ctx->xt->dst_start = p_out + s_size + s_width / 2; + break; + case YUV420_DMA_V_ODD: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + (5 * s_size) / 4; + ctx->xt->dst_start = p_out + (5 * s_size) / 4; + break; + case YUV420_DMA_V_EVEN: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + (11 * s_size) / 8; + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; + break; + case YUV420_DMA_Y_ODD_DOUBLING: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width; + ctx->xt->sgl[0].icg = s_width; + ctx->xt->src_start = p_in; + ctx->xt->dst_start = p_out + s_width; + break; + case YUV420_DMA_U_ODD_DOUBLING: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + s_size; + ctx->xt->dst_start = p_out + s_size + s_width / 2; + break; + case YUV420_DMA_V_ODD_DOUBLING: + ctx->xt->numf = s_height / 4; + ctx->xt->sgl[0].size = s_width / 2; + ctx->xt->sgl[0].icg = s_width / 2; + ctx->xt->src_start = p_in + (5 * s_size) / 4; + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; + break; + case YUYV_DMA_ODD: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width * 2; + ctx->xt->sgl[0].icg = s_width * 2; + ctx->xt->src_start = p_in; + ctx->xt->dst_start = p_out; + break; + case YUYV_DMA_EVEN: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width * 2; + ctx->xt->sgl[0].icg = s_width * 2; + ctx->xt->src_start = p_in + s_size; + ctx->xt->dst_start = p_out + s_width * 2; + break; + case YUYV_DMA_EVEN_DOUBLING: + default: + ctx->xt->numf = s_height / 2; + ctx->xt->sgl[0].size = s_width * 2; + ctx->xt->sgl[0].icg = s_width * 2; + ctx->xt->src_start = p_in; + ctx->xt->dst_start = p_out + s_width * 2; + break; + } + + /* Common parameters for al transfers */ + ctx->xt->frame_size = 1; + ctx->xt->dir = DMA_MEM_TO_MEM; + ctx->xt->src_sgl = false; + ctx->xt->dst_sgl = true; + flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | + DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP; + + tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); + if (tx == NULL) { + v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); + return; + } + + if (do_callback) { + tx->callback = dma_callback; + tx->callback_param = ctx; + } + + ctx->cookie = dmaengine_submit(tx); + if (dma_submit_error(ctx->cookie)) { + v4l2_warn(&pcdev->v4l2_dev, + "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", + ctx->cookie, p_in, p_out, s_size * 3/2); + return; + } + + dma_async_issue_pending(chan); +} + +static void deinterlace_device_run(void *priv) +{ + struct deinterlace_ctx *ctx = priv; + struct deinterlace_q_data *dst_q_data; + + atomic_set(&ctx->dev->busy, 1); + + dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); + + dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); + + switch (dst_q_data->fmt->fourcc) { + case V4L2_PIX_FMT_YUV420: + switch (dst_q_data->fmt->field) { + case V4L2_FIELD_INTERLACED_TB: + dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", + __func__); + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); + break; + case V4L2_FIELD_NONE: + default: + dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", + __func__); + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); + break; + } + break; + case V4L2_PIX_FMT_YUYV: + default: + switch (dst_q_data->fmt->field) { + case V4L2_FIELD_INTERLACED_TB: + dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", + __func__); + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); + break; + case V4L2_FIELD_NONE: + default: + dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", + __func__); + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); + break; + } + break; + } + + dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); +} + +/* + * video ioctls + */ +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1); + strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1); + cap->bus_info[0] = 0; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT + | V4L2_CAP_STREAMING; + + return 0; +} + +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) +{ + int i, num; + struct deinterlace_fmt *fmt; + + num = 0; + + for (i = 0; i < NUM_FORMATS; ++i) { + if (formats[i].types & type) { + /* index-th format of type type found ? */ + if (num == f->index) + break; + /* Correct type but haven't reached our index yet, + * just increment per-type index */ + ++num; + } + } + + if (i < NUM_FORMATS) { + /* Format found */ + fmt = &formats[i]; + strncpy(f->description, fmt->name, sizeof(f->description) - 1); + f->pixelformat = fmt->fourcc; + return 0; + } + + /* Format not found */ + return -EINVAL; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + return enum_fmt(f, MEM2MEM_CAPTURE); +} + +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + return enum_fmt(f, MEM2MEM_OUTPUT); +} + +static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) +{ + struct vb2_queue *vq; + struct deinterlace_q_data *q_data; + + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); + if (!vq) + return -EINVAL; + + q_data = get_q_data(f->type); + + f->fmt.pix.width = q_data->width; + f->fmt.pix.height = q_data->height; + f->fmt.pix.field = q_data->fmt->field; + f->fmt.pix.pixelformat = q_data->fmt->fourcc; + + switch (q_data->fmt->fourcc) { + case V4L2_PIX_FMT_YUV420: + f->fmt.pix.bytesperline = q_data->width * 3 / 2; + break; + case V4L2_PIX_FMT_YUYV: + default: + f->fmt.pix.bytesperline = q_data->width * 2; + } + + f->fmt.pix.sizeimage = q_data->sizeimage; + + return 0; +} + +static int vidioc_g_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + return vidioc_g_fmt(priv, f); +} + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + return vidioc_g_fmt(priv, f); +} + +static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) +{ + switch (f->fmt.pix.pixelformat) { + case V4L2_PIX_FMT_YUV420: + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; + break; + case V4L2_PIX_FMT_YUYV: + default: + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; + } + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; + + return 0; +} + +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct deinterlace_fmt *fmt; + struct deinterlace_ctx *ctx = priv; + + fmt = find_format(f); + if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { + v4l2_err(&ctx->dev->v4l2_dev, + "Fourcc format (0x%08x) invalid.\n", + f->fmt.pix.pixelformat); + return -EINVAL; + } + return vidioc_try_fmt(f, fmt); +} + +static int vidioc_try_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct deinterlace_fmt *fmt; + struct deinterlace_ctx *ctx = priv; + + fmt = find_format(f); + if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { + v4l2_err(&ctx->dev->v4l2_dev, + "Fourcc format (0x%08x) invalid.\n", + f->fmt.pix.pixelformat); + return -EINVAL; + } + + return vidioc_try_fmt(f, fmt); +} + +static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) +{ + struct deinterlace_q_data *q_data; + struct vb2_queue *vq; + + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); + if (!vq) + return -EINVAL; + + q_data = get_q_data(f->type); + if (!q_data) + return -EINVAL; + + if (vb2_is_busy(vq)) { + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); + return -EBUSY; + } + + q_data->fmt = find_format(f); + if (!q_data->fmt) { + v4l2_err(&ctx->dev->v4l2_dev, + "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", + f->type, f->fmt.pix.width, f->fmt.pix.height, + f->fmt.pix.pixelformat, f->fmt.pix.field); + return -EINVAL; + } + + q_data->width = f->fmt.pix.width; + q_data->height = f->fmt.pix.height; + + switch (f->fmt.pix.pixelformat) { + case V4L2_PIX_FMT_YUV420: + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; + break; + case V4L2_PIX_FMT_YUYV: + default: + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; + } + + dprintk(ctx->dev, + "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", + f->type, q_data->width, q_data->height, q_data->fmt->fourcc, + q_data->fmt->field); + + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + int ret; + + ret = vidioc_try_fmt_vid_cap(file, priv, f); + if (ret) + return ret; + return vidioc_s_fmt(priv, f); +} + +static int vidioc_s_fmt_vid_out(struct file *file, void *priv, + struct v4l2_format *f) +{ + int ret; + + ret = vidioc_try_fmt_vid_out(file, priv, f); + if (ret) + return ret; + + return vidioc_s_fmt(priv, f); +} + +static int vidioc_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *reqbufs) +{ + struct deinterlace_ctx *ctx = priv; + + return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); +} + +static int vidioc_querybuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct deinterlace_ctx *ctx = priv; + + return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); +} + +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) +{ + struct deinterlace_ctx *ctx = priv; + + return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); +} + +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) +{ + struct deinterlace_ctx *ctx = priv; + + return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); +} + +static int vidioc_streamon(struct file *file, void *priv, + enum v4l2_buf_type type) +{ + struct deinterlace_q_data *s_q_data, *d_q_data; + struct deinterlace_ctx *ctx = priv; + + /* Check that src and dst queues have the same format */ + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); + if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) + return -EINVAL; + + return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); +} + +static int vidioc_streamoff(struct file *file, void *priv, + enum v4l2_buf_type type) +{ + struct deinterlace_ctx *ctx = priv; + + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); +} + +static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, + .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, + .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, + .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, + + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, + + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, +}; + + +/* + * Queue operations + */ +struct vb2_dc_conf { + struct device *dev; +}; + +static int deinterlace_queue_setup(struct vb2_queue *vq, + const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); + struct deinterlace_q_data *q_data; + unsigned int size, count = *nbuffers; + + q_data = get_q_data(vq->type); + + switch (q_data->fmt->fourcc) { + case V4L2_PIX_FMT_YUV420: + size = q_data->width * q_data->height * 3 / 2; + break; + case V4L2_PIX_FMT_YUYV: + default: + size = q_data->width * q_data->height * 2; + } + + *nplanes = 1; + *nbuffers = count; + sizes[0] = size; + + alloc_ctxs[0] = ctx->dev->alloc_ctx; + + dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); + + return 0; +} + +static int deinterlace_buf_prepare(struct vb2_buffer *vb) +{ + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + struct deinterlace_q_data *q_data; + + dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); + + q_data = get_q_data(vb->vb2_queue->type); + + if (vb2_plane_size(vb, 0) < q_data->sizeimage) { + dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", + __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, q_data->sizeimage); + + return 0; +} + +static void deinterlace_buf_queue(struct vb2_buffer *vb) +{ + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); +} + +static struct vb2_ops deinterlace_qops = { + .queue_setup = deinterlace_queue_setup, + .buf_prepare = deinterlace_buf_prepare, + .buf_queue = deinterlace_buf_queue, +}; + +static int queue_init(void *priv, struct vb2_queue *src_vq, + struct vb2_queue *dst_vq) +{ + struct deinterlace_ctx *ctx = priv; + int ret; + + memset(src_vq, 0, sizeof(*src_vq)); + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + src_vq->io_modes = VB2_MMAP | VB2_USERPTR; + src_vq->drv_priv = ctx; + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + src_vq->ops = &deinterlace_qops; + src_vq->mem_ops = &vb2_dma_contig_memops; + + ret = vb2_queue_init(src_vq); + if (ret) + return ret; + + memset(dst_vq, 0, sizeof(*dst_vq)); + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; + dst_vq->drv_priv = ctx; + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + dst_vq->ops = &deinterlace_qops; + dst_vq->mem_ops = &vb2_dma_contig_memops; + + return vb2_queue_init(dst_vq); +} + +/* + * File operations + */ +static int deinterlace_open(struct file *file) +{ + struct deinterlace_dev *pcdev = video_drvdata(file); + struct deinterlace_ctx *ctx = NULL; + + ctx = kzalloc(sizeof *ctx, GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + file->private_data = ctx; + ctx->dev = pcdev; + + ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); + if (IS_ERR(ctx->m2m_ctx)) { + int ret = PTR_ERR(ctx->m2m_ctx); + + kfree(ctx); + return ret; + } + + ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) + + sizeof(struct data_chunk), GFP_KERNEL); + if (!ctx->xt) { + int ret = PTR_ERR(ctx->xt); + + kfree(ctx); + return ret; + } + + dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); + + return 0; +} + +static int deinterlace_release(struct file *file) +{ + struct deinterlace_dev *pcdev = video_drvdata(file); + struct deinterlace_ctx *ctx = file->private_data; + + dprintk(pcdev, "Releasing instance %p\n", ctx); + + v4l2_m2m_ctx_release(ctx->m2m_ctx); + kfree(ctx->xt); + kfree(ctx); + + return 0; +} + +static unsigned int deinterlace_poll(struct file *file, + struct poll_table_struct *wait) +{ + struct deinterlace_ctx *ctx = file->private_data; + int ret; + + deinterlace_lock(ctx); + ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); + deinterlace_unlock(ctx); + + return ret; +} + +static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct deinterlace_ctx *ctx = file->private_data; + + return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); +} + +static const struct v4l2_file_operations deinterlace_fops = { + .owner = THIS_MODULE, + .open = deinterlace_open, + .release = deinterlace_release, + .poll = deinterlace_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = deinterlace_mmap, +}; + +static struct video_device deinterlace_videodev = { + .name = MEM2MEM_NAME, + .fops = &deinterlace_fops, + .ioctl_ops = &deinterlace_ioctl_ops, + .minor = -1, + .release = video_device_release, +}; + +static struct v4l2_m2m_ops m2m_ops = { + .device_run = deinterlace_device_run, + .job_ready = deinterlace_job_ready, + .job_abort = deinterlace_job_abort, + .lock = deinterlace_lock, + .unlock = deinterlace_unlock, +}; + +static int deinterlace_probe(struct platform_device *pdev) +{ + struct deinterlace_dev *pcdev; + struct video_device *vfd; + dma_cap_mask_t mask; + int ret = 0; + + pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); + if (!pcdev) + return -ENOMEM; + + spin_lock_init(&pcdev->irqlock); + + dma_cap_zero(mask); + dma_cap_set(DMA_INTERLEAVE, mask); + pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); + if (!pcdev->dma_chan) + goto free_dev; + + if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { + v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); + goto rel_dma; + } + + ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); + if (ret) + goto rel_dma; + + atomic_set(&pcdev->busy, 0); + mutex_init(&pcdev->dev_mutex); + + vfd = video_device_alloc(); + if (!vfd) { + v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); + ret = -ENOMEM; + goto unreg_dev; + } + + *vfd = deinterlace_videodev; + vfd->lock = &pcdev->dev_mutex; + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); + if (ret) { + v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); + goto rel_vdev; + } + + video_set_drvdata(vfd, pcdev); + snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); + pcdev->vfd = vfd; + v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME + " Device registered as /dev/video%d\n", vfd->num); + + platform_set_drvdata(pdev, pcdev); + + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(pcdev->alloc_ctx)) { + v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); + ret = PTR_ERR(pcdev->alloc_ctx); + goto err_ctx; + } + + pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); + if (IS_ERR(pcdev->m2m_dev)) { + v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); + ret = PTR_ERR(pcdev->m2m_dev); + goto err_m2m; + } + + q_data[V4L2_M2M_SRC].fmt = &formats[1]; + q_data[V4L2_M2M_DST].fmt = &formats[0]; + + return 0; + + v4l2_m2m_release(pcdev->m2m_dev); +err_m2m: + video_unregister_device(pcdev->vfd); +err_ctx: + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); +rel_vdev: + video_device_release(vfd); +unreg_dev: + v4l2_device_unregister(&pcdev->v4l2_dev); +rel_dma: + dma_release_channel(pcdev->dma_chan); +free_dev: + kfree(pcdev); + + return ret; +} + +static int deinterlace_remove(struct platform_device *pdev) +{ + struct deinterlace_dev *pcdev = + (struct deinterlace_dev *)platform_get_drvdata(pdev); + + v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); + v4l2_m2m_release(pcdev->m2m_dev); + video_unregister_device(pcdev->vfd); + v4l2_device_unregister(&pcdev->v4l2_dev); + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); + dma_release_channel(pcdev->dma_chan); + kfree(pcdev); + + return 0; +} + +static struct platform_driver deinterlace_pdrv = { + .probe = deinterlace_probe, + .remove = deinterlace_remove, + .driver = { + .name = MEM2MEM_NAME, + .owner = THIS_MODULE, + }, +}; + +static void __exit deinterlace_exit(void) +{ + platform_driver_unregister(&deinterlace_pdrv); +} + +static int __init deinterlace_init(void) +{ + return platform_driver_register(&deinterlace_pdrv); +} + +module_init(deinterlace_init); +module_exit(deinterlace_exit); +